set 2 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 4 EXERCISES
The following question based on metals, non metals, minerals, ores, properties, uses topic of general science mcq
(a) Poor conductor of electricity
(b) Low density
(c) Low melting point
(d) All of the above
The correct answers to the above question in:
Answer: (d)
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Question : 1
Which one of the following metals is liquid at room temperature?
a) Mercury
b) Nickel
c) Lead
d) Tin
Answer »Answer: (a)
Question : 2
Which of the following statement regarding metals is true?
a) Generally most of metals have high melting and boiling points.
b) All metals are solid in nature.
c) Metals can be used to make handle of cooking utensils
d) Gold is used generally to make electrical wires.
Answer »Answer: (a)
Mercury being a metal is liquid at room temperature. Metals are good conductors of heat and therefore cannot be used to make a handle it will result in burns.
Gold cannot be used to make electrical wires it is very expensive therefore metals like copper are used for it.
Question : 3
Which of the following non-metals has shining lustrous surfaces?
a) Iodine and phosphorus
b) Graphite and phosphorus
c) Graphite and iodine
d) Phosphorus and chlorine
Answer »Answer: (c)
Graphite which is crystalline form of carbon and iodine are the only two non-metals which has shining lustrous surfaces.
Question : 4
The chemical formula of the Plaster of Paris is
a) $CaSO_4 ·½H_2O$
b) $CaSO_4 ·H_2O$
c) $CaSO_4$
d) $CaSO_4 ·2H_2O$
Answer »Answer: (a)
Question : 5
Which of the following non-metals has shining lustrous surfaces?
a) Graphite and iodine
b) Iodine and phosphorus
c) Graphite and phosphorus
d) Phosphorus and chlorine
Answer »Answer: (a)
Question : 6
A non metal that catches fire at room temperature is-
a) Sulphur
b) Phosphorus
c) Sodium
d) Fluorine
Answer »Answer: (b)
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